Added ClientResponse.cookies()

Added cookies() method on ClientResponse, that exposes the response
cookies.

Issue: SPR-15236

spring-webflux/src/main/java/org/springframework/web/reactive/function/client/ClientResponse.java

@@ -26,7 +26,9 @@ import reactor.core.publisher.Mono;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
+import org.springframework.http.ResponseCookie;
 import org.springframework.http.client.reactive.ClientHttpResponse;
+import org.springframework.util.MultiValueMap;
 import org.springframework.web.reactive.function.BodyExtractor;
 
 /**
@@ -51,6 +53,11 @@ public interface ClientResponse {
 	 */
 	Headers headers();
 
+	/**
+	 * Return cookies of this response.
+	 */
+	MultiValueMap<String, ResponseCookie> cookies();
+
 	/**
 	 * Extract the body with the given {@code BodyExtractor}. Unlike {@link #bodyToMono(Class)} and
 	 * {@link #bodyToFlux(Class)}; this method does not check for a 4xx or 5xx  status code before

spring-webflux/src/main/java/org/springframework/web/reactive/function/client/DefaultClientResponse.java

@@ -32,8 +32,10 @@ import reactor.core.publisher.Mono;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
+import org.springframework.http.ResponseCookie;
 import org.springframework.http.client.reactive.ClientHttpResponse;
 import org.springframework.http.codec.HttpMessageReader;
+import org.springframework.util.MultiValueMap;
 import org.springframework.web.reactive.function.BodyExtractor;
 import org.springframework.web.reactive.function.BodyExtractors;
 
@@ -68,6 +70,11 @@ class DefaultClientResponse implements ClientResponse {
 		return this.headers;
 	}
 
+	@Override
+	public MultiValueMap<String, ResponseCookie> cookies() {
+		return this.response.getCookies();
+	}
+
 	@Override
 	public <T> T body(BodyExtractor<T, ? super ClientHttpResponse> extractor) {
 		return extractor.extract(this.response, new BodyExtractor.Context() {

spring-webflux/src/test/java/org/springframework/web/reactive/function/client/DefaultClientResponseTests.java

@@ -39,11 +39,15 @@ import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpRange;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
+import org.springframework.http.ResponseCookie;
 import org.springframework.http.client.reactive.ClientHttpResponse;
 import org.springframework.http.codec.DecoderHttpMessageReader;
 import org.springframework.http.codec.HttpMessageReader;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertSame;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 import static org.springframework.web.reactive.function.BodyExtractors.toMono;
@@ -96,6 +100,18 @@ public class DefaultClientResponseTests {
 		assertEquals(httpHeaders, headers.asHttpHeaders());
 	}
 
+	@Test
+	public void cookies() throws Exception {
+		ResponseCookie cookie = ResponseCookie.from("foo", "bar").build();
+		MultiValueMap<String, ResponseCookie> cookies = new LinkedMultiValueMap<>();
+		cookies.add("foo", cookie);
+
+		when(mockResponse.getCookies()).thenReturn(cookies);
+
+		assertSame(cookies, defaultClientResponse.cookies());
+	}
+
+
 	@Test
 	public void body() throws Exception {
 		DefaultDataBufferFactory factory = new DefaultDataBufferFactory();